Refactor the BatteryInfo

Move the battery stats logic to background because it is time
consuming.

Bug: 112262502
Test: robotest still pass
Change-Id: I794bc82a4f1b5ae5a883c89d447116601a86558f

src/com/android/settings/fuelgauge/BatteryHistoryPreference.java

@@ -54,7 +54,7 @@ public class BatteryHistoryPreference extends Preference {
         BatteryInfo.getBatteryInfo(getContext(), info -> {
             mBatteryInfo = info;
             notifyChanged();
-        }, batteryStats.getStats(), false);
+        }, batteryStats, false);
     }
 
     public void setBottomSummary(CharSequence text) {